Moon cake packaging heat sealing sealing strength detection method

March 14, 2024

Abstract: Mooncake is a traditional food of the Chinese nation and is a must-have for the Mid-Autumn Festival. The sealing strength of the mooncake packaging heat seal is directly related to the sealing performance and bag breaking rate of the packaging and affects the quality of the mooncake in the circulation process. In this paper, Labthink XLW (M) intelligent electronic tensile testing machine moon cake packaging sealing strength during heat sealing for example, describes the principle of the test, and the basic parameters of the test equipment, such as a step for the packaging companies detect heat seal sealing effect Provide a practical and effective verification method.

Keywords: heat sealing, sealing, heat sealing strength, sealing strength, heat sealing strength, flexible plastic packaging, intelligent electronic tensile testing machine, moon cake, cakes, air leakage, bag

1 , the meaning

The seal strength of the heat sealing of the package is also called the heat sealing strength. The strength of the heat sealing is mainly related to the heat sealing parameters of the heat sealing machine during packaging and the heat sealing layer material of the packaging bag.

Moon cake is a famous Han traditional snack. It is a must-have item for the Mid-Autumn Festival and it is a symbol of reunion and harmony. Moon cakes have many different flavors and flavors. Among them, Cantonese style, Beijing style, Soviet style, and tide style moon cakes are loved by people from all over the north and south. Moon cakes often contain more oil components, which are more sensitive to oxygen and require good sealing and barrier properties. The sealing properties of moon cakes are related to the seal strength of heat seals. In addition, the poor sealing strength of the packaging may also cause problems such as air leakage in the moon cake packaging, bagging, and breakage at the closure.

2 , the status quo

The packaging materials of moon cakes on the market today are mainly plastic composite films. The moon cakes are often protected by a tray structure, and a deoxidizer is built in to reduce the oxygen content in the packages.

Figure 1 Moon cake common packaging

For the inspection standards of the seal strength of the heat sealing of the flexible plastic packaging, refer to QB/T 2358-98 " Hydraulic strength test method of plastic film packaging bag".

3 , test sample

A certain brand of moon cake plastic composite film packaging bags.

4 , testing equipment

In this test, the XLW(M) intelligent electronic tensile testing machine independently developed by Jinan Languang Electromechanical Technology Co., Ltd. was used to test the sealing strength of the sample.

Figure 2 XLW (M) Intelligent Electronic Tensile Testing Machine

4.1 Equipment Principle

The device is divided into two chucks, the upper chuck is the moving chuck, can move according to the set speed, the upper chuck is equipped with a force sensor and a displacement sensor, and the lower chuck is still during the test. Do not move. During the test, the two ends of the specimen are clamped on the upper and lower chucks respectively, and the two chucks perform relative movement, so that the specimen generates displacement and force value changes, and is recorded by the force sensor and the displacement sensor in real time. After processing and calculation, the seal strength, tensile, tearing, and deformation rate of the sample are obtained.

4.2 Scope of application

(1) This equipment is suitable for the sealing material strength (heat sealing strength) performance, tensile strength and deformation rate, breaking force, tear resistance, shear performance, 180 degree peeling, 90 degree peeling performance testing; By replacing the fixture, the device can also be extended to the puncture resistance of the film, the puncture force of the infusion bag cover, the puncture / pullout force of the soft rubber stopper or the oral liquid cap , the opening force of the combination cover, the jelly cup and the opening force of the yogurt cup, The pulling force of cosmetics brush bristles or toothbrush bristles, the unwinding force of the tape, the separation force of the protective film, the pull force of the ziplock bag mouth, and the like, and the detection of various product or packaging properties.

(2) The equipment complies with various national and international standards such as ISO 37 , GB 13022 , GB 8808 , GB 1040 , GB 4850 , GB 7753 , GB 7754 , GB 453 , GB/T 17200 , GB/T 16578 , GB/ T 7122 , GB/T 2790 , GB/T 2791 , GB/T 2792 , ASM E4 , ASTM D828 , ASTM D882 , ASTM D1938 , ASTM D3330 , JIS P8113 , QB/T 2358 , QB/T 1130, etc.

4.3 Equipment Parameters

Equipment specifications are available in 100 N , 200 N , 500 N , and the accuracy is Class 1 . The test speed of the equipment is 7 gears, which are 50 mm/min , 100 mm/min , 150 mm/min , 200 mm/min , 250 mm/min , 300 mm/min , and 500 mm/min , respectively. Test standards require selection. A testing machine integrates seven independent test programs, stretching, stripping, tearing, and heat sealing, to provide users with a choice of multiple test items. Pneumatically clamping the sample, the clamping part is evenly distributed to ensure the accuracy of the test data. Limits protection, overload protection, automatic return, and power-down memory intelligent configuration to ensure the safety of the user's operation. With the LystemTM laboratory data sharing system, test data and device information can be reported simply by setting up and operating, making it easy to centralize and systematically manage laboratory test data.

5 , the test process

(1) Cut 10 pieces of test strips with a width of 15 mm and a length of 100 mm from each heat seal of the moon cake packaging sample with a cutter , and sample each of the heat sealing samples from 3 samples.

(2) Set the parameters such as sample width and test speed.

(3) The sample is unfolded, and the two ends are respectively clamped on the upper and lower chucks, so that the long axis direction of the sample coincides with the center lines of the upper and lower chucks, and the heat sealing position of the sample and the upper and lower chucks The distance between them is equal.

(4) Click the " Test " button. The test begins and the instrument automatically displays the final test results.

6 , test results

The average sealing strength of the moon cake packaging samples was 25.431 N/15mm , the average of the lower sealing strength was 31.025 N/15mm , and the average of the back sealing strength was 15.964 N/15mm .

7. Conclusion

The sealing effect of the heat sealing of the packaging bag has an important influence on the sealing performance of the packaging bag and the impact resistance of the sealing. The seal strength is a physical index that characterizes the effect of the heat seal. In this paper , the seal strengths of the top and bottom seals and the back seal of the moon cake packaging bag were tested with the XLW(M) intelligent electronic tensile tester. The repeatability of the test results was good. Test results Accurate and reliable, the instrument is simple to operate. In addition to the seal strength, but also concerned about the oxygen transmission rate, sealing performance, solvent residue, friction coefficient and other performance indicators moon cake packaging bags, the relevant testing equipment and services, you can visit the blue light on our website or call us. Labthink has been committed to providing professional packaging testing equipment and services to customers around the world, focusing on solving inconvenient packaging problems. Labthink expects to enhance technology exchanges and cooperation with enterprises and institutions in the industry!